nx_v128_share_probe.nx

nx_v128_share_probe.nx -- F618 rung-1 HOT-LOOP RE-MEASURE (native): what share of the shipped-config P-frame encode (416x320, emode 673, qp 22 -- the nx_vcodec_layout_gate recipe) is the 16x16 motion search (vm_search_q, the SAD-dominated kernel the design names first)? Times (a) the full vv_enc_rct9 P encode and (b) an isolated whole-frame vm_search_q sweep with the encoder's own args, same frames. The sweep is a LOWER BOUND on total SAD-family work (encode also does subpel refine, me8 partition searches when armed, zero-SAD skip checks, intra SAD). license_tier: ORIGINAL